Home / 20,639.21-30,973.39-8,159.64

Finding the Fourth Proportional to 20,639.21, 30,973.39 and 8,159.64

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Solution

The fourth proportional to 20,639.21, 30,973.39 and 8,159.64 is: 12,245.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.21 : 30,973.39 = 8,159.64 : x
  2. Step 2: Convert to fraction form
    20,639.21/30,973.39 = 8,159.64/x
  3. Step 3: Cross multiply
    20,639.21x = 30,973.39 × 8,159.64
  4. Step 4: Simplify right side
    20,639.21x = 252,731,575.43
  5. Step 5: Solve for x
    x = 252,731,575.43/20,639.21
  6. Step 6: Final answer
    x = 12,245.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.